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            <ol class="post-toc"><li class="post-toc-item post-toc-level-2"><a class="post-toc-link" href="#一个关于JSP的简单MVC案例"><span class="post-toc-number">1.</span> <span class="post-toc-text">一个关于JSP的简单MVC案例</span></a></li></ol>
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<article id="post-A-simple-MVC-example"
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        <h1 class="post-card-title">A simple MVC example</h1>
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            <time class="post-time" title="2019-04-12 21:34:28" datetime="2019-04-12T21:34:28.000Z"  itemprop="datePublished">2019-04-12</time>

            


            

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            <h2 id="一个关于JSP的简单MVC案例"><a href="#一个关于JSP的简单MVC案例" class="headerlink" title="一个关于JSP的简单MVC案例"></a>一个关于<code>JSP</code>的简单<code>MVC</code>案例</h2><ul>
<li><em>程序示例图如下所示 :</em><figure class="image-bubble">
                <div class="img-lightbox">
                    <div class="overlay"></div>
                    <img src="/2019/04/12/A-simple-MVC-example/SimpleMVC.png" alt title>
                </div>
                <div class="image-caption"></div>
            </figure>
</li>
</ul>
<ul>
<li><em><code>Java bean</code> : 封装用户的身份信息.</em></li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.servlet.bean;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@ClassName</span>: UserInfo</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span>: 用户信息</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: Apr 8, 2019 5:15:21 PM</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">UserInfo</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">	<span class="keyword">private</span> String name;</span><br><span class="line">	<span class="keyword">private</span> String password;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="title">UserInfo</span><span class="params">(String name, String password)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">super</span>();</span><br><span class="line">		<span class="keyword">this</span>.name = name;</span><br><span class="line">		<span class="keyword">this</span>.password = password;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> String <span class="title">getName</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> name;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setName</span><span class="params">(String name)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.name = name;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> String <span class="title">getPassword</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">return</span> password;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setPassword</span><span class="params">(String password)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">this</span>.password = password;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<ul>
<li><em>操作数据库的工具类</em></li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.servlet.util;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.sql.Connection;</span><br><span class="line"><span class="keyword">import</span> java.sql.DriverManager;</span><br><span class="line"><span class="keyword">import</span> java.sql.PreparedStatement;</span><br><span class="line"><span class="keyword">import</span> java.sql.ResultSet;</span><br><span class="line"><span class="keyword">import</span> java.sql.SQLException;</span><br><span class="line"><span class="keyword">import</span> java.sql.Statement;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@ClassName</span>: JDBCUtil</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span>: 操作数据库工具类</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: Apr 8, 2019 5:08:24 PM</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">JDBCUtil</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">	<span class="comment">// initialize the driver of database.</span></span><br><span class="line">	<span class="keyword">static</span> &#123;</span><br><span class="line">		<span class="keyword">try</span> &#123;</span><br><span class="line">			Class.forName(<span class="string">"com.mysql.cj.jdbc.Driver"</span>);</span><br><span class="line">		&#125; <span class="keyword">catch</span> (ClassNotFoundException e) &#123;</span><br><span class="line"></span><br><span class="line">			e.printStackTrace();</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="comment">// Return a database connection object.</span></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">static</span> Connection <span class="title">getConnection</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		Connection connection = <span class="keyword">null</span>;</span><br><span class="line">		<span class="keyword">try</span> &#123;</span><br><span class="line">			connection = DriverManager.getConnection(</span><br><span class="line">					<span class="string">"jdbc:mysql://LOCALHOST/DatabaseName?"</span> + <span class="string">"useSSL=false&amp;serverTimezone=UTC&amp;allowPublicKeyRetrieval=true"</span>,</span><br><span class="line">					<span class="string">"root"</span>, <span class="string">"DatabasePassword"</span>);</span><br><span class="line">		&#125; <span class="keyword">catch</span> (SQLException e) &#123;</span><br><span class="line">			e.printStackTrace();</span><br><span class="line">		&#125;</span><br><span class="line"></span><br><span class="line">		<span class="keyword">return</span> connection;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="comment">// release the resource of connecting.</span></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">freeResource</span><span class="params">(Connection connection, PreparedStatement preparedStatement, ResultSet resultSet)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">if</span> (connection != <span class="keyword">null</span>) &#123;</span><br><span class="line">			<span class="keyword">try</span> &#123;</span><br><span class="line">				connection.close();</span><br><span class="line">			&#125; <span class="keyword">catch</span> (SQLException e) &#123;</span><br><span class="line"></span><br><span class="line">				e.printStackTrace();</span><br><span class="line">			&#125;</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="keyword">if</span> (preparedStatement != <span class="keyword">null</span>) &#123;</span><br><span class="line">			<span class="keyword">try</span> &#123;</span><br><span class="line">				preparedStatement.close();</span><br><span class="line">			&#125; <span class="keyword">catch</span> (SQLException e) &#123;</span><br><span class="line"></span><br><span class="line">				e.printStackTrace();</span><br><span class="line">			&#125;</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="keyword">if</span> (resultSet != <span class="keyword">null</span>) &#123;</span><br><span class="line">			<span class="keyword">try</span> &#123;</span><br><span class="line">				resultSet.close();</span><br><span class="line">			&#125; <span class="keyword">catch</span> (SQLException e) &#123;</span><br><span class="line"></span><br><span class="line">				e.printStackTrace();</span><br><span class="line">			&#125;</span><br><span class="line">		&#125;</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<ul>
<li><em><code>控制器(controller)</code> : 用于验证用户的登录信息并根据其结果作出相应的处理.</em></li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.servlet.controller;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.io.IOException;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.ServletException;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.annotation.WebServlet;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServlet;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServletRequest;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServletResponse;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.servlet.bean.UserInfo;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.servlet.modImpl.DalidateUserInfo;</span><br><span class="line"></span><br><span class="line"><span class="meta">@WebServlet</span>(<span class="string">"/LoginServlet"</span>)</span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">LoginServlet</span> <span class="keyword">extends</span> <span class="title">HttpServlet</span> </span>&#123;</span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="keyword">long</span> serialVersionUID = <span class="number">1L</span>;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="title">LoginServlet</span><span class="params">()</span> </span>&#123;</span><br><span class="line">		<span class="keyword">super</span>();</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">protected</span> <span class="keyword">void</span> <span class="title">doGet</span><span class="params">(HttpServletRequest request, HttpServletResponse response)</span></span></span><br><span class="line"><span class="function">			<span class="keyword">throws</span> ServletException, IOException </span>&#123;</span><br><span class="line"></span><br><span class="line">		request.setCharacterEncoding(<span class="string">"utf-8"</span>);</span><br><span class="line">		String name = request.getParameter(<span class="string">"userName"</span>);</span><br><span class="line">		String password = request.getParameter(<span class="string">"userPassword"</span>);</span><br><span class="line"></span><br><span class="line">		UserInfo userInfo = <span class="keyword">new</span> UserInfo(name, password);</span><br><span class="line">		<span class="keyword">boolean</span> result = <span class="keyword">new</span> DalidateUserInfo().vaildateUserInfo(userInfo);</span><br><span class="line">		<span class="keyword">if</span> (result) &#123;</span><br><span class="line">			<span class="comment">// Sends a temporary redirect response to the client using thespecified redirect</span></span><br><span class="line">			<span class="comment">// location URL and clears the buffer.</span></span><br><span class="line">			response.sendRedirect(<span class="string">"weclome.jsp"</span>);</span><br><span class="line">		&#125; <span class="keyword">else</span> &#123;</span><br><span class="line">			response.sendRedirect(<span class="string">"error.jsp"</span>);</span><br><span class="line">		&#125;</span><br><span class="line"></span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">protected</span> <span class="keyword">void</span> <span class="title">doPost</span><span class="params">(HttpServletRequest request, HttpServletResponse response)</span></span></span><br><span class="line"><span class="function">			<span class="keyword">throws</span> ServletException, IOException </span>&#123;</span><br><span class="line"></span><br><span class="line">		doGet(request, response);</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<ul>
<li><em>用于操作用户信息的接口.</em></li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.servlet.model;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.servlet.bean.UserInfo;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@ClassName</span>: LoginDao</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span>: 操作用户信息的接口</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: Apr 8, 2019 5:53:53 PM</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">interface</span> <span class="title">UserInfoDao</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">vaildateUserInfo</span><span class="params">(UserInfo userInfo)</span></span>;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<ul>
<li><em><code>模型(model)</code> : 实现了操作用户信息接口的类.</em></li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.servlet.modImpl;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.sql.Connection;</span><br><span class="line"><span class="keyword">import</span> java.sql.PreparedStatement;</span><br><span class="line"><span class="keyword">import</span> java.sql.ResultSet;</span><br><span class="line"><span class="keyword">import</span> java.sql.SQLException;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.servlet.bean.UserInfo;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.servlet.model.UserInfoDao;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.servlet.util.JDBCUtil;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@ClassName</span>: DalidateUserInfo</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span>: 验证用户的身份信息</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: Apr 8, 2019 4:55:27 PM</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">DalidateUserInfo</span> <span class="keyword">implements</span> <span class="title">UserInfoDao</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">static</span> String sql = <span class="string">"SELECT name,password FROM user WHERE NAME=? AND PASSWORD=?"</span>;</span><br><span class="line">	<span class="comment">// 节省JDBC连接资源.</span></span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">static</span> Connection connection = JDBCUtil.getConnection();</span><br><span class="line">	<span class="keyword">private</span> PreparedStatement preparedStatement;</span><br><span class="line">	<span class="keyword">private</span> ResultSet resultSet;</span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">vaildateUserInfo</span><span class="params">(UserInfo userInfo)</span> </span>&#123;</span><br><span class="line">		<span class="keyword">try</span> &#123;</span><br><span class="line">			preparedStatement = connection.prepareStatement(sql);</span><br><span class="line">			preparedStatement.setString(<span class="number">1</span>, userInfo.getName());</span><br><span class="line">			preparedStatement.setString(<span class="number">2</span>, userInfo.getPassword());</span><br><span class="line"></span><br><span class="line">			resultSet = preparedStatement.executeQuery();</span><br><span class="line"></span><br><span class="line">			<span class="keyword">if</span> (resultSet.next()) &#123;</span><br><span class="line">				<span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line">			&#125;</span><br><span class="line"></span><br><span class="line">		&#125; <span class="keyword">catch</span> (SQLException e) &#123;</span><br><span class="line">			e.printStackTrace();</span><br><span class="line">		&#125; <span class="keyword">finally</span> &#123;</span><br><span class="line">			JDBCUtil.freeResource(<span class="keyword">null</span>, preparedStatement, resultSet);</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="keyword">return</span> <span class="keyword">false</span>;</span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<ul>
<li><em><code>视图(view)</code> : 用户登录界面.:</em></li>
</ul>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">%@</span> <span class="attr">page</span> <span class="attr">language</span>=<span class="string">"java"</span> <span class="attr">contentType</span>=<span class="string">"text/html; charset=UTF-8"</span></span></span><br><span class="line"><span class="tag">    <span class="attr">pageEncoding</span>=<span class="string">"UTF-8"</span>%&gt;</span></span><br><span class="line"><span class="meta">&lt;!DOCTYPE <span class="meta-keyword">html</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">html</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">meta</span> <span class="attr">charset</span>=<span class="string">"UTF-8"</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">title</span>&gt;</span>Login in<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line">	<span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">				<span class="tag">&lt;<span class="name">div</span> <span class="attr">align</span>=<span class="string">"center"</span>&gt;</span></span><br><span class="line">					<span class="tag">&lt;<span class="name">form</span> <span class="attr">action</span>=<span class="string">"LoginServlet"</span> <span class="attr">method</span>=<span class="string">"post"</span>&gt;</span></span><br><span class="line">						<span class="tag">&lt;<span class="name">table</span>&gt;</span></span><br><span class="line">							<span class="tag">&lt;<span class="name">tr</span>&gt;</span></span><br><span class="line">								<span class="tag">&lt;<span class="name">td</span>&gt;</span>name<span class="tag">&lt;/<span class="name">td</span>&gt;</span></span><br><span class="line">								<span class="tag">&lt;<span class="name">td</span>&gt;</span></span><br><span class="line">									<span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"userName"</span>/&gt;</span></span><br><span class="line">								<span class="tag">&lt;/<span class="name">td</span>&gt;</span></span><br><span class="line">							<span class="tag">&lt;/<span class="name">tr</span>&gt;</span></span><br><span class="line">							<span class="tag">&lt;<span class="name">tr</span>&gt;</span></span><br><span class="line">								<span class="tag">&lt;<span class="name">td</span>&gt;</span>password<span class="tag">&lt;/<span class="name">td</span>&gt;</span></span><br><span class="line">								<span class="tag">&lt;<span class="name">td</span>&gt;</span></span><br><span class="line">									<span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"userName"</span>/&gt;</span></span><br><span class="line">								<span class="tag">&lt;/<span class="name">td</span>&gt;</span></span><br><span class="line">							<span class="tag">&lt;/<span class="name">tr</span>&gt;</span></span><br><span class="line">						<span class="tag">&lt;/<span class="name">table</span>&gt;</span><span class="tag">&lt;<span class="name">br</span>&gt;</span></span><br><span class="line">						<span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"submit"</span> <span class="attr">value</span>=<span class="string">"login in"</span> &gt;</span></span><br><span class="line">					<span class="tag">&lt;/<span class="name">form</span>&gt;</span></span><br><span class="line">				<span class="tag">&lt;/<span class="name">div</span>&gt;</span></span><br><span class="line">		<span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>
<ul>
<li><em>日记 : 今天做了大学第一个兼职!在一个购物广场旁折风车,串风车,固定风车…中午吃坐在地上吃盒饭时让我突然想起了四年前撤学外出的自己,难忘的是青春哟!计划把外快买书嘿嘿嘿..(っ•̀ω•́)っ✎⁾⁾⁾</em></li>
</ul>

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